§  25.212   Narrowband analog transmissions, digital transmissions, and video
transmissions in the GSO Fixed-Satellite Service.

   (a) Except as otherwise provided by this part, criteria for
   unacceptable levels of interference caused by other satellite networks
   shall be established on the basis of nominal operating conditions and
   with the objective of minimizing orbital separations between
   satellites.

   (b) Emissions with an occupied bandwidth of less than 2 MHz are not
   protected from interference from wider bandwidth transmissions if the
   r.f. carrier frequency of the narrowband signal is within ±1 MHz of one
   of the frequencies specified in §  25.211(a).

   (c) In the 14.0 through 14.5 GHz band, an earth station with an antenna
   equivalent diameter of 1.2 meters or greater may be routinely licensed
   for transmission of narrowband analog services with bandwidths up to
   200 kHz if the maximum input power spectral density into the antenna
   does not exceed −8 dBW/4 kHz and the maximum transmitted satellite
   carrier EIRP density does not exceed 17 dBW/4 kHz. Such earth stations
   may be routinely licensed for transmission of narrowband and/or
   wideband digital services, including digital video services, if the
   maximum input spectral power density into the antenna does not exceed
   −14 dBW/4 kHz, and the maximum transmitted satellite carrier EIRP
   density does not exceed +10.0 dBW/4 kHz. Antennas transmitting in the
   14.0 through 14.5 GHz band with a major and/or minor axis smaller than
   1.2 meters are subject to the provisions of §  25.220, which may include
   power reduction requirements.

   (d)(1) For earth stations licensed before March 10, 2005 in the
   5925-6425 MHz band, an earth station with an equivalent diameter of 4.5
   meters or greater may be routinely licensed for transmission of SCPC
   services if the maximum power densities into the antenna do not exceed
   +0.5 dBW/4 kHz for analog SCPC carriers with bandwidths up to 200 kHz,
   and do not exceed −2.7 dBW/4 kHz for narrow and/or wideband digital
   SCPC carriers.

   (2) For earth stations licensed after March 10, 2005 in the 5925-6425
   MHz band, an earth station with an equivalent diameter of 4.5 meters or
   greater may be routinely licensed for transmission of SCPC services if
   the maximum power densities into the antenna do not exceed +0.5 dBW/4
   kHz for analog SCPC carriers with bandwidths up to 200 kHz, and do not
   exceed −2.7 − 10log(N) dBW/4 kHz for narrow and/or wideband digital
   SCPC carriers. For digital SCPC using frequency division multiple
   access (FDMA) or time division multiple access (TDMA) technique, N is
   equal to one. For digital SCPC using code division multiple access
   (CDMA) technique, N is the maximum number of co-frequency
   simultaneously transmitting earth stations in the same satellite
   receiving beam.

   (3) Antennas with an equivalent diameter smaller than 4.5 meters in the
   5925-6425 MHz band are subject to the provisions of §  25.220 of this
   chapter, which may include power reduction requirements.

   (e) Each applicant for authorization for transmissions in the
   fixed-satellite service proposing to use transmitted satellite carrier
   EIRP densities, and/or maximum antenna input power densities in excess
   of those specified in paragraph (c) of this section in the 14.0-14.5
   GHz band, or in paragraph (d) of this section in the 5925-6425 MHz
   band, respectively, must comply with the procedures set forth in
   §  25.220.

   (f) In the 24.75-25.25 GHz band, an earth station that meets the
   antenna gain pattern requirements set forth in § §  25.209(a) and (b) of
   this part may be routinely licensed if the maximum power density into
   the antenna does not exceed 3.5 dBW/MHz.

   [ 58 FR 13421 , Mar. 11, 1993, as amended at  62 FR 5931 , Feb. 10, 1997;
    62 FR 51378 , Oct. 1, 1997;  70 FR 32256 , June 2, 2005;  70 FR 33376 , June
   8, 2005;  72 FR 50030 , Aug. 29, 2007;  73 FR 70902 , Nov. 24, 2008]

   return arrow Back to Top